Juneau Temperatures: Averages by Month

The numbers here tell you how hot and cold the weather usually is in Juneau, Alaska during each month of the year.

The average high and low temperatures are listed below monthly and annually for Juneau, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 50, 60 or 70 °F each month in Juneau, scroll down farther. There are also monthly and yearly counts of days with cold weather.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average Juneau temperatures

High °F

Low °F

High °C

Low °C

35

26

January

1

-3

37

28

February

3

-2

41

30

March

5

-1

49

35

April

10

2

57

42

May

14

6

62

48

June

17

9

63

51

July

17

11

63

50

August

17

10

57

46

September

14

8

48

39

October

9

4

40

31

November

4

0

37

28

December

3

-2

49

38

Year

10

3

Days of Warm Weather in Juneau

A warm summer day in Juneau means temperatures in the 70s Fahrenheit. The city normally sees 17 days a year above 69 degrees, which show up sporadically from May until September. Just once a year on average, one day here heats up to 80 °F.

Days per month in Juneau of at least 50, 60 or 70 °F

50 °F10 °C

60 °F16 °C

70 °F21 °C

January

0

0

0

February

0

0

0

March

1

0

0

April

12

2

0

May

26

10

2

June

30

17

5

July

31

20

5

August

31

18

5

September

29

7

1

October

12

0

0

November

1

0

0

December

1

0

0

Year

172

74

17

How Often Juneau Has Cold Temperatures

Freezing temperatures can happen in Juneau anytime from September until May. Juneau typically sees 101 frosty nights a year. The coldest nights drop down to below 0 °F (-18 °C). But the temperature doesn't go that low here every year.

For an average of 29 days annually the thermometer never rises above freezing. Days that chilly usually show up during November to March.

Days in Juneau with a minimum temperature that drops to 32, 20 and 10 °F
or lower